20110889 has 4 divisors (see below), whose sum is σ = 20182740. Its totient is φ = 20039040.

The previous prime is 20110879. The next prime is 20110927. The reversal of 20110889 is 98801102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14784025 + 5326864 = 3845^2 + 2308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35504 + ... + 36065.

It is an arithmetic number, because the mean of its divisors is an integer number (5045685).

Almost surely, 2^20110889 is an apocalyptic number.

It is an amenable number.

20110889 is a deficient number, since it is larger than the sum of its proper divisors (71851).

20110889 is an equidigital number, since it uses as much as digits as its factorization.

20110889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71850.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 20110889 is about 4484.5165848729. The cubic root of 20110889 is about 271.9425024443.

The spelling of 20110889 in words is "twenty million, one hundred ten thousand, eight hundred eighty-nine".